\(\left(1-\frac{3}{10}-x\right):\left(\frac{19}{10}-1-\frac{2}{5}\right)+\frac{4}{5}=1\)
\(\Rightarrow\left(\frac{7}{10}-x\right):\frac{1}{2}=\frac{1}{5}\\ \frac{7}{10}-x=\frac{1}{5}.\frac{1}{2}\\ \frac{7}{10}-x=\frac{1}{10}\\ \Rightarrow x=\frac{7}{10}-\frac{1}{10}=\frac{3}{5}\)
tim x : (1-3/10-x):(19/10-1-2/5)+4/5=1
A,3^3. x-3^4=2^5-5
B,(2^3+2^1). x+3^2.x?5-10=10^2
C,(2^x+1)^3.2^2=500
D,(7x-11)^3=32.5^2+200
E,5.(3x-2)^2-3^3:3^2=2
F,(x-5)^19=16.( x-5)^6
G,4^x+80=3^yy
Tim x va y thuoc N
a) (1*3/10-x):(19/10-1-2/5)+4/5=1
Tìm x biết (1-3/10-x):(19/10- 1- 2/5)+ 4/5= 1
tim x
x.2 4/9 = 4 2/5 _1 4/7
x:10 6/5 = 4 6/5 + 9 7/5
x: 3 10/3 = 9 1/9 - 5 1/9
Bai 1: Tim so nguyen x biet:
x+(x+1)+(x+2)+...+35=0
Bai 2: Tim GTLN:
a) 8-(x+2)^2=E
b) -|x+2|+10=F
Bai 3: Tim x \(\in\)Z:
a)(2x-4)(x+4)<0
b)(x+5)(3x-12)>0
Bai 11: Cho:
S=1-2+3-4+5-6+...+19-20
a) S co\(⋮\)2; 3; 5 khong?
b) Tim tat ca cac uoc cua S
chi tiet gi minh nha
1)5x+2(x+1/2)=7
2)8x-3(x+2)=9
3)5(x-2)+3(x-1)=19
4)7(x-3)-2x-5=11
5)6x+3-2(x-5)=30
6)8(x-1/8)-5(x-1/5)=10
7)13x-5-2(x+3)=1
8)4(x-2)-2(x-1)=12
9)6x-13-2-(x×5)=7
10)7(x-5)-3(x+5)=30
a) 165-(35:x+3)*15=15
b) (1*3/10-x):(19/10-1-2/5)+4/5=1
giúp mk giải câu này nhé!!!
Tim x
(1 +5^2 +5^4 +5^6 +5^8 ) x X = 5+ 5^5+ 5^3 +...+5^10
